With space mission developing toward the direction of variety and complexity,traditional damping technology which the high precision instrument and equipmentsensitive of spacecraft need to can not be met the requriement of harsh dynamicenvironment. Nonlinear energy sink is a new damping device which is differentfrom linear vibration absorber. The mechansim of vibration suppression is targetedenergy transfer, it has charateristies of high efficiency, stong robustness and so on.Nonlinear vibration absorption ...